Duplicating roll



Nov. 27 1923 F'. c. GOTTSCHALK DUPLIGATINGROLL' Filed July 27. 1921 I HWI Patented Nov. 27, 1923. r l,475,263

UNITED STATES PATENT OFFICE.

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Application filed m 21, 1921. Serial Iii 487,941.

v To all whom it may concern: cated by the numeral 3, alayerof oiled or 55 4 Be it known that I, FREDERICK, G. Go'rr otherwise suitably treated pa er 4, of a SCI-IALK, a citizen of the United States, re-.- kind well known in this art as raft paper, siding at New York, in the countyof New treated with linseed oil to make itwater and 5 York and State of New York, have invented glycerine proof united to the oil cloth layer certain new and useful Improvements in Du by means of adhesive 5, which may be of 60 plicating Rolls,'of which the following is any suitable composition, as for instance, a specification. 1 I glue-and-glycerine, the gelatinous duplicat- This invention relates to duplicating rolls ing composition, which is indicated by the or sheets for duplicating machines, and has numeral 6, being supplied and adhering to v for its object to provide an improved form the outer surface of the paper layer 4. Prof 65 of roll or sheet which will be durable, from erably the rough surface 0 the oil cloth (asa which the hektographic coating is not easil suming that oil cloth is used havin onl removed, which will not dry out and whic one smooth face) is inward, so that t e a is economical to manufacture and convenhesive unites readily and firmly therewith,

.ient to handle. and so that when the sheet is rolledup the 70 Other objects and aims of the invention, smooth fate of the oil cloth comes in con-.-

more or less broad than thosev stated above, tact with the gelatin surface and adhesion together with the advantages inherent, will between the two is minimized.

be in part obvious and in part specifically A sheet or roll made up as set forth is dureferred to in the course of the following rable and not easily. torn, because of the 75 description of the elements, combinations, nature of main backing 3; the duplicating arrangements of parts, and applications of composition will retain its glycerine, .be-' principles constituting the invention; and cause the linseed-oil-treated paper is comthe scope of rotection contemplated will "paratively impervious to glycerine,-and furappear from t e claims.

In the accompanying drawings, which are sive 5 contains glycerine; and where an oil to be taken as part of this specification, and cloth is used as the backing 3, with a finin which. I have shown merely a referred ished face outwardly, adhesion between 'it form ofembodiment of invention and the hektographic layer 6when the sheet I Figure 1' is 2. plan view of a portion of a is rolled up, is'minimized. 86 sheet embodying my invention, with suc- Inasmuch as many changes could be made cessive component layers broken away; and in the above construction, and many appar- Figure 2 is across section. a ehtly widely different embodiments of my Duplitating rolls or sheets have hereto invention could be made without departing ,fore been manufactured in which the backfrom'the scope thereof, it is intended that 90 mg consisted of oiled paper, and sheets have all matter contained in the above descripalso been made in' which'the backing contion, or shown in the accompanying drawsisted of oilcloth, or other fabric'or rela ,ings,' shall be interpreted as illustrative and 40 tively strong material, such as textiles. The not in a limiting sense.

use of oiled papenas a backing presents the It is also tobe understood that; the lanadvantage t at the gelatinous duplicating ,guage used in the following claims is intendcomposition does not dry out so'readily, but ed to cover all the generic and specific feathere is the disadvantage that the paper tures of the invention herein described and tears rather easily. An oil clothbr fabric all statements of the invention which, as a backing makes a more durable sheet, but matter of language, might be'said to fall when thisis. used the com osition dries out therebetween. more readilythan where the oiled pa r is I claim: used, probably by absorption of the ycers 1. A duplicating roll comprising a back- 0' ine component into the fabric. Accor ingly, in of relatively strong fabric, a paper layer ,Ipropose to make a backing for the gelat' adi ous duplicating composition which shall con- 'plicating composition on the paper layer. sist of a layer of 011 cloth or' textile fabric 2. A duplicating roll comprising a backor similar relatively strong material, indiing of relativeley strong fabric,-an oi1'treatther, possibly, because the underlying adhe- 80 esively united thereto and a layer of du- 5 ing of a 10 ing ed paper layer adhesively united thereto, and a layer of duplicating composition on the paper layer.

3. A duplicating roll comprising a backrelatively strong fabric, a glycerineproof paper layer adhesively'united thereto, and a layer of duplicating composition on the paper layer.

4. A duplicating roll comprising a backof oil-cloth, having a rough face and a finished face, a glycerine-proof paper adhesively united to the rough face thereof, and a layer of duplicating composition on the. paper layer.

5. In a duplicating roll, a reinforcing 15 backing of relatively strong fabric,- a layer of suitably treated paper to render the same Water and glycerine proof 'aiiixed thereto and a layer of duplicating composition on the paper.

In testimony whereof I afiix my signature.

FREDERICK C. GOTTSCHALK. 

